Skiving and folding machine.



D. N. PRIME.

SMVING AND FOLDING MACHINE.

APPLICATION FILED MAR. 1. I916.

1,281,654. I Patentgd 0013.15, 1918.

4 SHEETS-SHEET l- D. N. PRIME.

SKIVING AND FOLDING MACHINE.

APPLICATION FILED MAR. I. 1916.

Patented Oct. 15, 1918.

4 SHEETS-SHEET 2.

VHVTUE. [EM/k" D. N. PRIME.

SKIVING AND FOLDING MACHINE.

APPLICATION FILED MAR. 1. I9I6- 1,281,654. v Patented Oct. 15, 1918.

4 SHEETS-SHEET 3.

D. N. PRIME.

.SKIVING AND FOLDING MACHINE.

APPLICATION FILED IIIAR. I. I9l6- Patented Oct. 15, 1918.

4 SHEETS-SHEET 4.

in connection with the DANIEL IL PRIME, OF LYNN, MASSACHUSETTS, ASSIGNOBIBY T0 UNTTED SHOE MACHINERY cORroRA'rIoN, 0F PATERSON,

POBATION OF NEW JERSEY.

M sNE ASSIGNMENTS, NEW JERSEY, A G R- SKIVING AND FOLDING MACHINE. I a

Application fi led March 7, 1916.

To all whom it may concern Be it known that I, DA IEL N. a citizen ofthe United Lynn, in the county of Essex and State of Massachusetts, haveinvented certain Ima provements in Skiving and Folding Machines, ofwhich the following description,

accompanying drawings, is a Specification, like reference characters onthe drawings indicating like parts in the several figures. V

This invention relates to machines for finishing the edges of sheetmaterial and is herein illustrated in connection with a machine forskiving, folding and pressing the margin of a part of the upper of ashoe and for introducing into the fold prior to the pressing operationan adhesive filament.

Hitherto it has been customary to apply cement in liquid form to theskived margin of a piece of upper said piece to the foldinginstrumentalities of a folding machine. Attempts to embody cementapplying apparatus in such a ma chine have thus far not met with successfor various reasons, among others for the reason that liquid cementwhich will properly stick down the flap of the fold requires an intervalfor drying cation to the material and the time of the folding andpressing operations in order to render it properly tacky.

According to one feature of the invention an adhesive filament isintroduced into the fold, after which cooperating pressing membersrelatively movable toward and from each other grip and press the foldand the inclosed filament. By making use in this manner of an adhesivefilament which is normally tacky but not wet, the operation of cementingthe margin in themanner hitherto practised may be dispensed with.

Anothenfeature of the invention relates to the provision in a machine-ofthis type of means for skiving the margin of the material prior tofolding the margin and introducing into the fold the adhesive filament.With this combination of mechanisms the skiving operation, as commonlycarried out on a separate machine, is no longer necessary.

These and other PRIM features of the invention,

including certain details of construction and w Specification of LettersPatent.

States, residing at leather before presenting between the time of itsappli- Patented oat. 15,1918.

Serial No. 82,7 53.

combinations of parts will be described as embodied in an illustrativemachine and pointed out in the appended claims.

' Referring to the accompanying draw- 1ngs,-

Figure which the present invention is embodied;/

. Fig. 2 is a plan view, the overhanging arm having been broken away;

Fig. 3 is a section on the'line 3-3 of Fig. 1; a

Fig. 4 is a section on the line 44 of Fig. 1;

Fig. 5 is a section on the line 55 of Fig. 1';

Fig. 6 is a detail, partly in section, of the grippers which press thefold and feed the stock;

Fig. 7 is a perspective from above of the skiving, tape applying andfold forming and pressing elements;

Fig. 8 is a perspective from beneath of the tape applying, folding andpressing elements.

The illustrative machine is adapted to skive the margin of a piece offlexible material, to fold the'skived margin over a piece of adhesivetape, and to press-the fold thus formed, the purpose of the tape beingprimarily to hold the flap of th'e'fold firmly attached to the body ofthe material thereby avoiding the necessity which has hitherto existedof applying cement to the skived margin prior to the folding operation.

Referring first to Fig. 1, the skiving mechanism is similar to thatshown in United States patent to Alexander No. 1,079,462 and comprises ahollow base 1 having a fiat top through which protrudes acylindricalskiving knife 7.. A feed roll 9 advances the stock to the knife and apresser-foot 11 holds the stock down'on the roll, an edge gage, not

1 is an elevation of a machine in 1 the 'stock. Inasmuch as the detailsof the skivingmechanism form no part of the present invention and anysuitable skiving mechanism may be used, no further description of saidmechanismwill be given other than to point out to a shaft 13 and thatthe feed roll is fast to a shaft 15 which is connected by a worm andgear with a shaft 17 said latter shaft being connected with the shaft13- by a beltthat the cylindrical knife is fast It will be understood,that the operator faces the machine as viewed in Fig. 1 and 5 presentsthe stock from left to right with its margin beneath the presser foot 11and that said margin is skived progressively as the stock is advanced bythe feed roll to the nife.

From the skivingmechanism the skived margin of the stock is engaged by afolder 21 by which it is folded about a strip. 23 of adhesive tape, saidtape runnin from a reel 25 down around an idle roll 27 and up betweentwosmall feed rolls 29. The grippers 31, 32 first swi'ngover the fold,then press it, then draw it diagonally upwardly toward the small feedrolls 29, then release the fold and return to the position shown 7 inthe drawings. The tape is coated on both sides with adhesive materialwith the result that the flap of the fold is, by the action of thegrippers or pressers 31, 32, stuck firmly to the body of the stock.

With' this brief outline of the mode. of

. operation of the machine the details of the stationary guides 69, thecarriage being thus free to slide as well as to move angularly inmechanism for operating the feed rolls 29 and the pressers 31, 32 willnow be described.

Referring more particularly to Figs. 1, 4 and 6, an-upright-shaft33,,driven from the shaft 17 by bevel gears 35, 37, carries fast to it abevel gear 39 which'meshes with a bevel gear 41 on a horizontal shaft 43to which are fast 'twogears 45, 47 and a barrel cam 49. The gear 47meshes with a gear 51 of the same size said gear being integral with asleeve 53 upon the farther end of- '31, 32 as well as to move thembodily in the direction of the line of feed, are set onedegrees apartand, by

hundred and eighty the gearing which has been described'above, arerotated at the same speed but in opposite directions.

The two grippers orpressers 31, 32 have stems 131,"- 132-which arepivoted at 65in a carriage 67 held between two flat faced any pathnotprevented by the flat faced guides. Inasmuch as theconnectionsjbetween the stems 131 and 132 and. their re .spective cams55 and 63 are identical, only that between the stem 1-32 and the cam 63-will 'be described. The upper endv of this latter stem is in the formof a two-part yoke which is connected with a cam follower 69 bytrunnions 71, the purpose of which will presently appear. With theconstruction thus far described it will be clear that rotation of thecams 55 and 63 opens tape 23 and is which bends a portion fold and pressand closes the grippers 31, 32 and moves them bodily up and down in aninclined path determined by the flat faced guides 69.

In order to swing the grippers bodily to- '63 and 49 are so timed that afour-motion feed is imparted to the grippers 31, 32, said grippers firstswinging from the position shown toward the operator until they arerespectively below and above the adjacent portion of the tape and thefolded material, then closing uponthe fold, then moving bodilydiagonally upward, then opening and moving away from the operator andfinally returning to the position shown, this'cycle of movements beingrepeated continuously as long as power is applied to the shaft 13.Inasmuch as the stem 132 of the gripper 32 extends diagonally across thestem 131 of the gripper 31, the hole in the'stem 132 through which thepivot 65 passes is elongated as shown in- Fig. 6.

The feed rolls 29 are formed by the ends 6 of two small shafts-(see Fig.3) the upper one of which carries-a bevel gear 77 which meshes with abevel gear 79 on an inclined shaft 81, to the upper end .of which isfast a bevel gear 83 (see Fig. 2) meshing with a bevel gear 85 fast tothat shaft 61. The upper one of the small shafts, the ends of which formthe rolls 29 (see Fig. 3), also carries a gear 87 which meshes with agear 89 on the lower shaft, the bearing of the e lower shaft beingpivoted at 91 and urged upwardly by a spring 93 the tension of which maybe controlled by a screw 95.

Referring. now more particularly to Figs.

7 and 8, the operation of the machine as a' whole will be explained. Asthe stock is fed from .left to right, the margin of the stock is skivedby the knife 7, the chip or skiving passing under the cutting edge ofsaid knife and The skived margin rides up on the sticky engaged bythefolder 21 down over-the edge of the tape and up eneath the samethereby-forming the fold in of the skived mar 'nthe skived stock aboveit.

the stock 100. The grippers 31, 32 then swing toward the tape under theaction of the roll 73 andbarrel cam 49, and during this swingingmovement the lower gripper 31 tends to wipe the folded over margin intoproper'position if it is'not already in such position. The" grippersthen close on the the inner surfaces thereof tightly againstthe tape.The grippers are then moved diagonally-upward towardtherolls 29, afterwhich they open, move away 7 from the tape and to their initial-positionready to repeat the cycle ofmove- .ments'. The folded margin passesbetween faster than do ever,

the rolls 2 9, the body of the stock being supported by the operatoruntil the selected margin thereof has been entirely folded and' pressed.In use the run of tape from the idle roll 27 for a considerable distanceback toward the reel is covered by a guard, but this has been omittedfrom the drawing to promote .clearness.

The movlng parts of the machine are so as the folded edge is fed betweenthem by the grippers, the gripping action of therolls 29 is increased tosuch an extent that they are capable of taking up any slack in the workbut not of feeding the work except as permitted by the roll 9 andgrippers 31, 32. The purpose of this mode of operation of the rolls 29is to permit the machine to be run continuously" while no leath'er pieceis being operated upon.

The tape illustrated comprises a strip of fabric coated on both sideswith a sticky but comparatively dry adhesive. It should be understood,however, that the particular nature of the adhesive element isimmaterial and that by the term adhesive filament 'is included ianyadhesive element which may be introduced progressively into the fold.And although particular skiving, folding and pressing mechanisms havebeen illustrated it should be understood that the invention is notlimited in the scope of its application to the particular mechanisms ortypes of mechanisms shown and described.

Having thus described my invention, 1 claim as new and desire to secureby Letters Patent of the United States;

1. A machine of the class described, having, in combination,fold-forming means, means for introducing into the folda comparativelydry but tacky filament, cooperatmg pressing members relatitgely movabletoward and from each other, and means for intermittently causingrelative movement between'the members to grip and press the fold and theinclosed filament.

2. A machine of the class. described, having, in combination, means forprogressively folding the margin'of a piece of flexible material, meansfor introducing an adhesive filament into the fold, means for pressingthe fold and the inclosed filament, and means for bodily moving thepressing means to feed the material.

3. A machine of the class described, having, in combination, means forprogressively folding the margin of a piece of flexible material, meansfor introducing an adhesive filament into the fold, means for pressingthe fold, and the inclosed filament, and

means for bodily moving the pressing means to feed the material and thefilament.

4. A machine of the class described, having, in combination, foldforming means, means for introducing into the fold an adhesive filament,cooperating pressing members relatively movable toward and from eachother, and means for intermittently causing relativemovement between themembers to grip and press the fold and the in: closed filament.

5. A machine of the class described, having, in combination, foldforming means, means'for introducing into the fold an ad "hesivefilament, coeperating pressing members, and means for swinging onemember toward the other to press the adhesive element firmly againstboth sides of the interior of the fold.

6. A machine of the class described, having, in combination, means forforming a fold in the margin of a piece of flexible material, means forintroducing into the fold an adhesive filament, coiiperatingfold-pressing members, a pivot on which one member is mounted and aboutwhich it may move into and out of contact with the work, and means formoving said last-named member about its pivot to press the fold and theinclosed filament.

, 7. A machine of the class described, having, in combinatiom means forskiving the edge of a piece of flexible material, means for forming afold in the margin having the skived edge, and means for introducinginto the fold an adhesive filament.

8. A machine of the class described, having, in combination, means forskiving the edge of a piece of fiexiblematerial, means for formingacfold in the margin having the skived edge, means for introducing intothe fold an adhesive filament, and means for pressing the fold.

. 9. A machine of the class described, having, in combination, means forskiving the edge of a piece of flexible material, means for forming afold in the margin having the skived edge, means for introducing intothe fold an adhesive filament, and reciprocating means for gripping thefold to press it.

' A machine of the class described, havmg, 1n combination, a stationaryfolder past I v which the-material is fed, a member located 1n proximityto said folder and located to direct into the fold an adhesive filament,and

- oscillatory means for pressing the filament inside the fold. 11. Amachine of the class described, hav- 7 ing, in comb1nati0n,.a stationaryfolder past which the material is fed, a roll'located in proximity tosaid folder and located to direct into the fold an adhesive filament,and oscillatory means for pressing the filament inside the fold, I

12. A machine of the class described, having, in combination, means forforming a fold in the margin of a piece of stock, and means for pressingthe fold, said last-named means comprisin pivoted gripping members, andmeans or swinging said members toward each other.

13. A machine for operating upon-parts of boots and shoes, having, incombination, means for feeding apiece of material into position to haveits margin operated upon, means for progressively forming a fold in saidmargin, means for introducing into the fold a dry adhesive filament,cooperating I pressing members, and means for swinging zo

